US3541579A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic stylus feed mechanism
Assignee: Graphic Sciences Inc
•
Filing: 1968-08-26
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Granted: 1970-11-17
•
Expires: 1988-08-26
Abstract
No abstract record available.
Inventors
- 👤 Eric A Von Hippel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:04
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/024; H04N1/032
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2718450A
Cited
US2723897A
Cited
US2916343A
Cited
US2938761A
Cited
US3214764A
Cited
US3328804A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-11-16 | 1974-05-18 | 1974-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-16 | 1978-05-18 | 1978-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-16 | 1982-05-18 | 1982-11-17 | $7700.00 | Window Closed / Lapsed |